TRIDELTA offers surge arresters up to 4,8 kV DC for rolling stock, tram or streetcars or for protection of DC equipment and overhead lines. Line arresters are an effective and economical option to protect existing as well as new transmission lines against lightning overvoltages in order to increase grid reliability and availability of transmission lines. Line arresters are suitable especially for line sections with low earthing impedance of the line towers, areas with high lightning activity, transmission lines without shield wire protection and for transmission lines with very high demand to their availability.